I will also say I find electrical work relatively easy (the work itself). The real work is figuring out what needs to be done. At this point for me basic work has been done enough to be simple to figure out. Sometime a novel situation comes up in terms of what I am doing (for example code doesn't consider running 240 for an electric brewery in a residential setting), something I haven't done before, (replacing a sub-panel) or just difficult logistics (getting power into an existing fireplace for installing an insert without damaging drywall), require some real thinking and planning.
I like to keep lights and outlets on separate circuits. If I were you I would assess your source of power (15A, 20A, and so on), what is currently on it (turn off the breaker and look all over the house for things that do not work, for example my pantry light and water softener are installed on the same circuit as some of my garage outlets), and what you plan on using it for (~1800 watts will trip a 15A circuit and ~2400 watts will trip a 20A circuit).
For example a small subset of the items I have in the garage are a shop vac has a 11A nameplate (11A*120V=1320W), a 2x500w (1000w) halogen work light, a 1500w ceramic tower heater, a DeWalt battery charger ~80W (that's what the modern 18v max is rated for any ways) and the lighting is 13 14.5W (159.5W) LED bulbs.
So running the work light, the shop vac, and the DeWalt charger (not unrealistic) would result in 1800 watts and trip even a 20A breaker (1320+80+1000=2400) if they were all on the same breaker.
My garage, which includes my wood working shop, is touched by all or part of 10 different circuits.